1 /* $OpenBSD: ttyflags.c,v 1.7 1997/03/04 05:48:00 tholo Exp $ */ 2 /* $NetBSD: ttyflags.c,v 1.8 1996/04/09 05:20:30 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Theo de Raadt 6 * Copyright (c) 1994 Christopher G. Demetriou 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Christopher G. Demetriou. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #ifndef lint 36 char copyright[] = 37 "@(#) Copyright (c) 1994 Christopher G. Demetriou\n\ 38 All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 static char rcsid[] = "$OpenBSD: ttyflags.c,v 1.7 1997/03/04 05:48:00 tholo Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/cdefs.h> 47 #include <sys/ioctl.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <limits.h> 53 #include <paths.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <ttyent.h> 58 #include <unistd.h> 59 60 int all __P((int)); 61 int ttys __P((char **, int)); 62 int ttyflags __P((struct ttyent *, int)); 63 void usage __P((void)); 64 65 int nflag, vflag; 66 67 /* 68 * Ttyflags sets the device-specific tty flags, based on the contents 69 * of /etc/ttys. It can either set all of the ttys' flags, or set 70 * the flags of the ttys specified on the command line. 71 */ 72 int 73 main(argc, argv) 74 int argc; 75 char *argv[]; 76 { 77 int aflag, ch, rval, pflag = 0; 78 79 aflag = nflag = vflag = 0; 80 while ((ch = getopt(argc, argv, "panv")) != -1) 81 switch (ch) { 82 case 'a': 83 aflag = 1; 84 break; 85 case 'n': /* undocumented */ 86 nflag = 1; 87 break; 88 case 'p': 89 pflag = 1; 90 break; 91 case 'v': 92 vflag = 1; 93 break; 94 case '?': 95 default: 96 usage(); 97 } 98 argc -= optind; 99 argv += optind; 100 101 if (aflag && argc != 0) 102 usage(); 103 104 if (setttyent() == 0) 105 err(1, "setttyent"); 106 107 if (aflag) 108 rval = all(pflag); 109 else 110 rval = ttys(argv, pflag); 111 112 if (endttyent() == 0) 113 warn("endttyent"); 114 115 exit(rval); 116 } 117 118 /* 119 * Change all /etc/ttys entries' flags. 120 */ 121 int 122 all(print) 123 int print; 124 { 125 struct ttyent *tep; 126 int rval; 127 128 rval = 0; 129 for (tep = getttyent(); tep != NULL; tep = getttyent()) 130 if (ttyflags(tep, print)) 131 rval = 1; 132 return (rval); 133 } 134 135 /* 136 * Change the specified ttys' flags. 137 */ 138 int 139 ttys(ttylist, print) 140 char **ttylist; 141 int print; 142 { 143 struct ttyent *tep; 144 int rval; 145 146 rval = 0; 147 for (; *ttylist != NULL; ttylist++) { 148 tep = getttynam(*ttylist); 149 if (tep == NULL) { 150 warnx("couldn't find an entry in %s for \"%s\"", 151 _PATH_TTYS, *ttylist); 152 rval = 1; 153 continue; 154 } 155 156 if (ttyflags(tep, print)) 157 rval = 1; 158 } 159 return (rval); 160 } 161 162 163 /* 164 * Actually do the work; find out what the new flags value should be, 165 * open the device, and change the flags. 166 */ 167 int 168 ttyflags(tep, print) 169 struct ttyent *tep; 170 int print; 171 { 172 int fd, flags = 0, rval = 0, st, sep = 0; 173 char path[PATH_MAX]; 174 char strflags[256]; 175 176 st = tep->ty_status; 177 strflags[0] = '\0'; 178 179 /* Find the full device path name. */ 180 (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name); 181 182 if (print == 0) { 183 /* Convert ttyent.h flags into ioctl flags. */ 184 if (st & TTY_LOCAL) { 185 flags |= TIOCFLAG_CLOCAL; 186 (void)strcat(strflags, "local"); 187 sep++; 188 } 189 if (st & TTY_RTSCTS) { 190 flags |= TIOCFLAG_CRTSCTS; 191 if (sep++) 192 (void)strcat(strflags, "|"); 193 (void)strcat(strflags, "rtscts"); 194 } 195 if (st & TTY_SOFTCAR) { 196 flags |= TIOCFLAG_SOFTCAR; 197 if (sep++) 198 (void)strcat(strflags, "|"); 199 (void)strcat(strflags, "softcar"); 200 } 201 if (st & TTY_MDMBUF) { 202 flags |= TIOCFLAG_MDMBUF; 203 if (sep++) 204 (void)strcat(strflags, "|"); 205 (void)strcat(strflags, "mdmbuf"); 206 } 207 if (vflag) 208 printf("%s setting flags to: %s\n", path, strflags); 209 } 210 211 if (nflag) 212 return (0); 213 214 /* Open the device NON-BLOCKING, set the flags, and close it. */ 215 if ((fd = open(path, O_RDONLY | O_NONBLOCK, 0)) == -1) { 216 if (!(errno == ENXIO || 217 (errno == ENOENT && (st & TTY_ON) == 0))) 218 rval = 1; 219 if (vflag) 220 warn("open %s", path); 221 return (rval); 222 } 223 if (print == 0) { 224 if (ioctl(fd, TIOCSFLAGS, &flags) == -1) 225 if (errno != ENOTTY || vflag) { 226 warn("TIOCSFLAGS on %s", path); 227 rval = (errno != ENOTTY); 228 } 229 } else { 230 if (ioctl(fd, TIOCGFLAGS, &flags) == -1) 231 if (errno != ENOTTY || vflag) { 232 warn("TIOCGFLAGS on %s", path); 233 rval = (errno != ENOTTY); 234 } 235 if (flags & TIOCFLAG_CLOCAL) { 236 (void)strcat(strflags, "local"); 237 sep++; 238 } 239 if (flags & TIOCFLAG_CRTSCTS) { 240 if (sep++) 241 (void)strcat(strflags, "|"); 242 (void)strcat(strflags, "rtscts"); 243 } 244 if (flags & TIOCFLAG_SOFTCAR) { 245 if (sep++) 246 (void)strcat(strflags, "|"); 247 (void)strcat(strflags, "softcar"); 248 } 249 if (flags & TIOCFLAG_MDMBUF) { 250 if (sep++) 251 (void)strcat(strflags, "|"); 252 (void)strcat(strflags, "mdmbuf"); 253 } 254 printf("%s flags are: %s\n", path, strflags); 255 } 256 if (close(fd) == -1) { 257 warn("close %s", path); 258 return (1); 259 } 260 return (rval); 261 } 262 263 /* 264 * Print usage information when a bogus set of arguments is given. 265 */ 266 void 267 usage() 268 { 269 (void)fprintf(stderr, "usage: ttyflags [-v] [-p] [-a | tty ... ]\n"); 270 exit(1); 271 } 272